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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">get_grayval_contour_xld</span><span data-if="c" style="display:none;">get_grayval_contour_xld</span><span data-if="cpp" style="display:none;">GetGrayvalContourXld</span><span data-if="dotnet" style="display:none;">GetGrayvalContourXld</span><span data-if="python" style="display:none;">get_grayval_contour_xld</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">get_grayval_contour_xld</span><span data-if="c" style="display:none;">get_grayval_contour_xld</span><span data-if="cpp" style="display:none;">GetGrayvalContourXld</span><span data-if="dotnet" style="display:none;">GetGrayvalContourXld</span><span data-if="python" style="display:none;">get_grayval_contour_xld</span></code> — Return gray values of an image at the positions of an XLD contour.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>get_grayval_contour_xld</b>(<a href="#Image"><i>Image</i></a>, <a href="#Contour"><i>Contour</i></a> :  : <a href="#Interpolation"><i>Interpolation</i></a> : <a href="#Grayval"><i>Grayval</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>get_grayval_contour_xld</b>(const Hobject <a href="#Image"><i>Image</i></a>, const Hobject <a href="#Contour"><i>Contour</i></a>, const char* <a href="#Interpolation"><i>Interpolation</i></a>, double* <a href="#Grayval"><i>Grayval</i></a>)</code></p>
<p>
<code>Herror <b>T_get_grayval_contour_xld</b>(const Hobject <a href="#Image"><i>Image</i></a>, const Hobject <a href="#Contour"><i>Contour</i></a>, const Htuple <a href="#Interpolation"><i>Interpolation</i></a>, Htuple* <a href="#Grayval"><i>Grayval</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>GetGrayvalContourXld</b>(const HObject&amp; <a href="#Image"><i>Image</i></a>, const HObject&amp; <a href="#Contour"><i>Contour</i></a>, const HTuple&amp; <a href="#Interpolation"><i>Interpolation</i></a>, HTuple* <a href="#Grayval"><i>Grayval</i></a>)</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HImage.html">HImage</a>::<b>GetGrayvalContourXld</b>(const HXLDCont&amp; <a href="#Contour"><i>Contour</i></a>, const HString&amp; <a href="#Interpolation"><i>Interpolation</i></a>) const</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HImage.html">HImage</a>::<b>GetGrayvalContourXld</b>(const HXLDCont&amp; <a href="#Contour"><i>Contour</i></a>, const char* <a href="#Interpolation"><i>Interpolation</i></a>) const</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HImage.html">HImage</a>::<b>GetGrayvalContourXld</b>(const HXLDCont&amp; <a href="#Contour"><i>Contour</i></a>, const wchar_t* <a href="#Interpolation"><i>Interpolation</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
</div>
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<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>GetGrayvalContourXld</b>(<a href="HObject.html">HObject</a> <a href="#Image"><i>image</i></a>, <a href="HObject.html">HObject</a> <a href="#Contour"><i>contour</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Interpolation"><i>interpolation</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Grayval"><i>grayval</i></a>)</code></p>
<p>
<code><a href="HTuple.html">HTuple</a> <a href="HImage.html">HImage</a>.<b>GetGrayvalContourXld</b>(<a href="HXLDCont.html">HXLDCont</a> <a href="#Contour"><i>contour</i></a>, string <a href="#Interpolation"><i>interpolation</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>get_grayval_contour_xld</b>(<a href="#Image"><i>image</i></a>: HObject, <a href="#Contour"><i>contour</i></a>: HObject, <a href="#Interpolation"><i>interpolation</i></a>: str) -&gt; Sequence[Union[int, float]]</code></p>
<p>
<code>def <b>get_grayval_contour_xld_s</b>(<a href="#Image"><i>image</i></a>: HObject, <a href="#Contour"><i>contour</i></a>: HObject, <a href="#Interpolation"><i>interpolation</i></a>: str) -&gt; Union[int, float]</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p>该算子 <code><span data-if="hdevelop" style="display:inline">get_grayval_contour_xld</span><span data-if="c" style="display:none">get_grayval_contour_xld</span><span data-if="cpp" style="display:none">GetGrayvalContourXld</span><span data-if="com" style="display:none">GetGrayvalContourXld</span><span data-if="dotnet" style="display:none">GetGrayvalContourXld</span><span data-if="python" style="display:none">get_grayval_contour_xld</span></code> returns interpolated
gray values at several subpixel positions of the <a href="#Image"><i><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></i></a>.
The coordinates of the positions are specified via one XLD contour
<a href="#Contour"><i><code><span data-if="hdevelop" style="display:inline">Contour</span><span data-if="c" style="display:none">Contour</span><span data-if="cpp" style="display:none">Contour</span><span data-if="com" style="display:none">Contour</span><span data-if="dotnet" style="display:none">contour</span><span data-if="python" style="display:none">contour</span></code></i></a>.  The gray values are returned in <a href="#Grayval"><i><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></i></a>.
</p>
<p>The interpolation method can be selected via the parameter
<a href="#Interpolation"><i><code><span data-if="hdevelop" style="display:inline">Interpolation</span><span data-if="c" style="display:none">Interpolation</span><span data-if="cpp" style="display:none">Interpolation</span><span data-if="com" style="display:none">Interpolation</span><span data-if="dotnet" style="display:none">interpolation</span><span data-if="python" style="display:none">interpolation</span></code></i></a>:
</p>
<dl class="generic">


<dt><b><i><span data-if="hdevelop" style="display:inline">'nearest_neighbor'</span><span data-if="c" style="display:none">"nearest_neighbor"</span><span data-if="cpp" style="display:none">"nearest_neighbor"</span><span data-if="com" style="display:none">"nearest_neighbor"</span><span data-if="dotnet" style="display:none">"nearest_neighbor"</span><span data-if="python" style="display:none">"nearest_neighbor"</span></i>:</b></dt>
<dd>
<p>
 The results are
the gray values of the nearest pixels to the selected coordinates.
For images of type byte, direction, cyclic, uint2, int1, int2,
int4, and int8, the parameter <a href="#Grayval"><i><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></i></a> is a tuple of
integer numbers.  For images of type real and complex, the
parameter <a href="#Grayval"><i><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></i></a> is a tuple of floating point numbers.
</p>
</dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'bilinear'</span><span data-if="c" style="display:none">"bilinear"</span><span data-if="cpp" style="display:none">"bilinear"</span><span data-if="com" style="display:none">"bilinear"</span><span data-if="dotnet" style="display:none">"bilinear"</span><span data-if="python" style="display:none">"bilinear"</span></i>:</b></dt>
<dd>
<p>
 The parameter
<a href="#Grayval"><i><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></i></a> is computed using a bilinear interpolation of the
four neighboring gray values of the selected coordinates.  The
result is a tuple of floating point numbers.  The runtime
increases significantly compared to <i><span data-if="hdevelop" style="display:inline">'nearest_neighbor'</span><span data-if="c" style="display:none">"nearest_neighbor"</span><span data-if="cpp" style="display:none">"nearest_neighbor"</span><span data-if="com" style="display:none">"nearest_neighbor"</span><span data-if="dotnet" style="display:none">"nearest_neighbor"</span><span data-if="python" style="display:none">"nearest_neighbor"</span></i>.
Direction and cyclic images are treated like byte images.
</p>
</dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'bicubic'</span><span data-if="c" style="display:none">"bicubic"</span><span data-if="cpp" style="display:none">"bicubic"</span><span data-if="com" style="display:none">"bicubic"</span><span data-if="dotnet" style="display:none">"bicubic"</span><span data-if="python" style="display:none">"bicubic"</span></i>:</b></dt>
<dd>
<p>
 The parameter
<a href="#Grayval"><i><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></i></a> is computed using a bicubic interpolation of
sixteen neighboring gray values of the selected coordinates.  The
result is a tuple of floating point numbers.  The runtime
increases significantly compared to <i><span data-if="hdevelop" style="display:inline">'bilinear'</span><span data-if="c" style="display:none">"bilinear"</span><span data-if="cpp" style="display:none">"bilinear"</span><span data-if="com" style="display:none">"bilinear"</span><span data-if="dotnet" style="display:none">"bilinear"</span><span data-if="python" style="display:none">"bilinear"</span></i>.
Direction and cyclic images are treated like byte images.  In this
mode, the resulting gray values may contain values that lie
outside of the range of numbers that can be represented by the
input image type.
</p>
</dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'bicubic_clipped'</span><span data-if="c" style="display:none">"bicubic_clipped"</span><span data-if="cpp" style="display:none">"bicubic_clipped"</span><span data-if="com" style="display:none">"bicubic_clipped"</span><span data-if="dotnet" style="display:none">"bicubic_clipped"</span><span data-if="python" style="display:none">"bicubic_clipped"</span></i>:</b></dt>
<dd>
<p>
 The parameter
<a href="#Grayval"><i><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></i></a> is computed using a bicubic interpolation of
sixteen neighboring gray values of the selected coordinates.  The
result is a tuple of floating point numbers.  The runtime
increases significantly compared to <i><span data-if="hdevelop" style="display:inline">'bilinear'</span><span data-if="c" style="display:none">"bilinear"</span><span data-if="cpp" style="display:none">"bilinear"</span><span data-if="com" style="display:none">"bilinear"</span><span data-if="dotnet" style="display:none">"bilinear"</span><span data-if="python" style="display:none">"bilinear"</span></i>.
Direction and cyclic images are treated like byte images.  In this
mode, resulting gray values that lie outside of the range of
numbers that can be represented by the input image type are
clipped to that range.
</p>
</dd>
</dl>
<p>Note that <code><span data-if="hdevelop" style="display:inline">get_grayval_contour_xld</span><span data-if="c" style="display:none">get_grayval_contour_xld</span><span data-if="cpp" style="display:none">GetGrayvalContourXld</span><span data-if="com" style="display:none">GetGrayvalContourXld</span><span data-if="dotnet" style="display:none">GetGrayvalContourXld</span><span data-if="python" style="display:none">get_grayval_contour_xld</span></code> does not take the domain of
the image into account, i.e., if the domain has been reduced, e.g.,
with <a href="reduce_domain.html"><code><span data-if="hdevelop" style="display:inline">reduce_domain</span><span data-if="c" style="display:none">reduce_domain</span><span data-if="cpp" style="display:none">ReduceDomain</span><span data-if="com" style="display:none">ReduceDomain</span><span data-if="dotnet" style="display:none">ReduceDomain</span><span data-if="python" style="display:none">reduce_domain</span></code></a>, gray values are returned even for points
that lie outside the domain.
</p>
<p>Please note also that each point of the XLD contour must be in the
range -0.5 &lt;= row coordinate &lt;
height(<a href="#Image"><i><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></i></a>)-0.5 and -0.5 &lt;= column
coordinate &lt; width(<a href="#Image"><i><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></i></a>)-0.5.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Image" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></b> (input_object)  </span><span>singlechannelimage <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject</span> (byte / direction / cyclic / int1 / int2 / uint2 / int4 / real / complex)</span>
</div>
<p class="pardesc">Image whose gray values are to be accessed.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Contour" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Contour</span><span data-if="c" style="display:none">Contour</span><span data-if="cpp" style="display:none">Contour</span><span data-if="com" style="display:none">Contour</span><span data-if="dotnet" style="display:none">contour</span><span data-if="python" style="display:none">contour</span></code></b> (input_object)  </span><span>xld_cont <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HXLDCont.html">HXLDCont</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HXLDCont.html">HXLDCont</a></span><span data-if="c" style="display:none">Hobject</span></span>
</div>
<p class="pardesc">Input XLD contour with the coordinates of the
positions.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Interpolation" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Interpolation</span><span data-if="c" style="display:none">Interpolation</span><span data-if="cpp" style="display:none">Interpolation</span><span data-if="com" style="display:none">Interpolation</span><span data-if="dotnet" style="display:none">interpolation</span><span data-if="python" style="display:none">interpolation</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Interpolation method.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'nearest_neighbor'</span>
    <span data-if="c" style="display:none">"nearest_neighbor"</span>
    <span data-if="cpp" style="display:none">"nearest_neighbor"</span>
    <span data-if="com" style="display:none">"nearest_neighbor"</span>
    <span data-if="dotnet" style="display:none">"nearest_neighbor"</span>
    <span data-if="python" style="display:none">"nearest_neighbor"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'bicubic'</span><span data-if="c" style="display:none">"bicubic"</span><span data-if="cpp" style="display:none">"bicubic"</span><span data-if="com" style="display:none">"bicubic"</span><span data-if="dotnet" style="display:none">"bicubic"</span><span data-if="python" style="display:none">"bicubic"</span>, <span data-if="hdevelop" style="display:inline">'bicubic_clipped'</span><span data-if="c" style="display:none">"bicubic_clipped"</span><span data-if="cpp" style="display:none">"bicubic_clipped"</span><span data-if="com" style="display:none">"bicubic_clipped"</span><span data-if="dotnet" style="display:none">"bicubic_clipped"</span><span data-if="python" style="display:none">"bicubic_clipped"</span>, <span data-if="hdevelop" style="display:inline">'bilinear'</span><span data-if="c" style="display:none">"bilinear"</span><span data-if="cpp" style="display:none">"bilinear"</span><span data-if="com" style="display:none">"bilinear"</span><span data-if="dotnet" style="display:none">"bilinear"</span><span data-if="python" style="display:none">"bilinear"</span>, <span data-if="hdevelop" style="display:inline">'nearest_neighbor'</span><span data-if="c" style="display:none">"nearest_neighbor"</span><span data-if="cpp" style="display:none">"nearest_neighbor"</span><span data-if="com" style="display:none">"nearest_neighbor"</span><span data-if="dotnet" style="display:none">"nearest_neighbor"</span><span data-if="python" style="display:none">"nearest_neighbor"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="Grayval" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Grayval</span><span data-if="c" style="display:none">Grayval</span><span data-if="cpp" style="display:none">Grayval</span><span data-if="com" style="display:none">Grayval</span><span data-if="dotnet" style="display:none">grayval</span><span data-if="python" style="display:none">grayval</span></code></b> (output_control)  </span><span>grayval(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Sequence[Union[int, float]]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real / </span><span data-if="hdevelop" style="display:inline">integer)</span><span data-if="dotnet" style="display:none"> (<i>double</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>double</i> / </span><span data-if="cpp" style="display:none">Hlong)</span><span data-if="c" style="display:none"> (<i>double</i> / </span><span data-if="c" style="display:none">Hlong)</span></span>
</div>
<p class="pardesc">Gray values of the selected image coordinates.</p>
</div>
<h2 id="sec_result">结果</h2>
<p>如果参数均有效，算子
<code><span data-if="hdevelop" style="display:inline">get_grayval_contour_xld</span><span data-if="c" style="display:none">get_grayval_contour_xld</span><span data-if="cpp" style="display:none">GetGrayvalContourXld</span><span data-if="com" style="display:none">GetGrayvalContourXld</span><span data-if="dotnet" style="display:none">GetGrayvalContourXld</span><span data-if="python" style="display:none">get_grayval_contour_xld</span></code> 返回值 <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    .  If
necessary, an exception is raised.</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="read_image.html"><span data-if="hdevelop" style="display:inline">read_image</span><span data-if="c" style="display:none">read_image</span><span data-if="cpp" style="display:none">ReadImage</span><span data-if="com" style="display:none">ReadImage</span><span data-if="dotnet" style="display:none">ReadImage</span><span data-if="python" style="display:none">read_image</span></a></code>, 
<code><a href="draw_xld.html"><span data-if="hdevelop" style="display:inline">draw_xld</span><span data-if="c" style="display:none">draw_xld</span><span data-if="cpp" style="display:none">DrawXld</span><span data-if="com" style="display:none">DrawXld</span><span data-if="dotnet" style="display:none">DrawXld</span><span data-if="python" style="display:none">draw_xld</span></a></code>, 
<code><a href="gen_contour_polygon_xld.html"><span data-if="hdevelop" style="display:inline">gen_contour_polygon_xld</span><span data-if="c" style="display:none">gen_contour_polygon_xld</span><span data-if="cpp" style="display:none">GenContourPolygonXld</span><span data-if="com" style="display:none">GenContourPolygonXld</span><span data-if="dotnet" style="display:none">GenContourPolygonXld</span><span data-if="python" style="display:none">gen_contour_polygon_xld</span></a></code>, 
<code><a href="edges_sub_pix.html"><span data-if="hdevelop" style="display:inline">edges_sub_pix</span><span data-if="c" style="display:none">edges_sub_pix</span><span data-if="cpp" style="display:none">EdgesSubPix</span><span data-if="com" style="display:none">EdgesSubPix</span><span data-if="dotnet" style="display:none">EdgesSubPix</span><span data-if="python" style="display:none">edges_sub_pix</span></a></code>
</p>
<h2 id="sec_alternatives">可替代算子</h2>
<p>
<code><a href="get_grayval_interpolated.html"><span data-if="hdevelop" style="display:inline">get_grayval_interpolated</span><span data-if="c" style="display:none">get_grayval_interpolated</span><span data-if="cpp" style="display:none">GetGrayvalInterpolated</span><span data-if="com" style="display:none">GetGrayvalInterpolated</span><span data-if="dotnet" style="display:none">GetGrayvalInterpolated</span><span data-if="python" style="display:none">get_grayval_interpolated</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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